Description The Microsoft.SharePoint.WebControls.DVListBox class inherits from the System.Web.UI.WebControls.ListBox to create a data source bindable ListBox that allows single or multiple selection as well as the Microsoft.SharePoint.WebControls.IDesignerEventAccessor interface to contract two members, OnDesignerLoad and OnDesignerPreRender. Since the ASP.NET ControlDesigner doesn’t call OnLoad or OnPreRender when requesting control preview generation and OnInit and OnPreRender are both protec